From: Volker Lendecke <Volker.Lendecke@SerNet.DE>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Milosz Tanski <milosz@adfin.com>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@infradead.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-aio@kvack.org" <linux-aio@kvack.org>,
Mel Gorman <mgorman@suse.de>, Tejun Heo <tj@kernel.org>,
Jeff Moyer <jmoyer@redhat.com>, Theodore Ts'o <tytso@mit.edu>,
Al Viro <viro@zeniv.linux.org.uk>,
Linux API <linux-api@vger.kernel.org>,
Michael Kerrisk <mtk.manpages@gmail.com>,
linux-arch@vger.kernel.org
Subject: Re: [PATCH v6 0/7] vfs: Non-blockling buffered fs read (page cache only)
Date: Wed, 3 Dec 2014 10:10:43 +0100 [thread overview]
Message-ID: <E1Xw5xg-00EfRs-CM@intern.SerNet.DE> (raw)
In-Reply-To: <20141202144200.a4ca81a46a43563a8874fd8e@linux-foundation.org>
On Tue, Dec 02, 2014 at 02:42:00PM -0800, Andrew Morton wrote:
> The question is whether a simpler approach such as fincore() will be
> sufficient.
For many use cases in Samba, fincore will probably be
enough. But Windows clients become more and more
multi-threaded, so Samba sees multiple parallel active read
requests. Samba's core SMB processing engine is single
threaded, and if due to that race we get blocked, more than
one data stream will be affected. We might make it an option
to use the fincore alternative, but I don't see it as a
default. The default will be the strict threadpool.
With best regards,
Volker Lendecke
--
SerNet GmbH, Bahnhofsallee 1b, 37081 Göttingen
phone: +49-551-370000-0, fax: +49-551-370000-9
AG Göttingen, HRB 2816, GF: Dr. Johannes Loxen
http://www.sernet.de, mailto:kontakt@sernet.de
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WARNING: multiple messages have this Message-ID (diff)
From: Volker Lendecke <Volker.Lendecke@SerNet.DE>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Milosz Tanski <milosz@adfin.com>,
LKML <linux-kernel@vger.kernel.org>,
Christoph Hellwig <hch@infradead.org>,
"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
"linux-aio@kvack.org" <linux-aio@kvack.org>,
Mel Gorman <mgorman@suse.de>, Tejun Heo <tj@kernel.org>,
Jeff Moyer <jmoyer@redhat.com>, Theodore Ts'o <tytso@mit.edu>,
Al Viro <viro@zeniv.linux.org.uk>,
Linux API <linux-api@vger.kernel.org>,
Michael Kerrisk <mtk.manpages@gmail.com>,
linux-arch@vger.kernel.org
Subject: Re: [PATCH v6 0/7] vfs: Non-blockling buffered fs read (page cache only)
Date: Wed, 3 Dec 2014 10:10:43 +0100 [thread overview]
Message-ID: <E1Xw5xg-00EfRs-CM@intern.SerNet.DE> (raw)
Message-ID: <20141203091043.Plm3Ir4RbZboBIGkYW-wk-NM4LlJ7vGlGyLtQy810os@z> (raw)
In-Reply-To: <20141202144200.a4ca81a46a43563a8874fd8e@linux-foundation.org>
On Tue, Dec 02, 2014 at 02:42:00PM -0800, Andrew Morton wrote:
> The question is whether a simpler approach such as fincore() will be
> sufficient.
For many use cases in Samba, fincore will probably be
enough. But Windows clients become more and more
multi-threaded, so Samba sees multiple parallel active read
requests. Samba's core SMB processing engine is single
threaded, and if due to that race we get blocked, more than
one data stream will be affected. We might make it an option
to use the fincore alternative, but I don't see it as a
default. The default will be the strict threadpool.
With best regards,
Volker Lendecke
--
SerNet GmbH, Bahnhofsallee 1b, 37081 Göttingen
phone: +49-551-370000-0, fax: +49-551-370000-9
AG Göttingen, HRB 2816, GF: Dr. Johannes Loxen
http://www.sernet.de, mailto:kontakt@sernet.de
next prev parent reply other threads:[~2014-12-03 9:10 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-10 16:40 [PATCH v6 0/7] vfs: Non-blockling buffered fs read (page cache only) Milosz Tanski
2014-11-10 16:40 ` Milosz Tanski
2014-11-10 16:40 ` [PATCH v6 1/7] vfs: Prepare for adding a new preadv/pwritev with user flags Milosz Tanski
2014-11-10 16:40 ` Milosz Tanski
2014-11-10 16:40 ` [PATCH v6 2/7] vfs: Define new syscalls preadv2,pwritev2 Milosz Tanski
2014-11-10 16:40 ` Milosz Tanski
2014-11-11 21:09 ` Jeff Moyer
2014-11-11 21:09 ` Jeff Moyer
2014-11-12 13:18 ` mohanty bhagaban
2014-11-10 16:40 ` [PATCH v6 3/7] x86: wire up preadv2 and pwritev2 Milosz Tanski
2014-11-10 16:40 ` Milosz Tanski
2014-11-10 16:40 ` [PATCH v6 4/7] vfs: RWF_NONBLOCK flag for preadv2 Milosz Tanski
2014-11-10 16:40 ` Milosz Tanski
2014-11-10 16:40 ` [PATCH v6 5/7] xfs: add RWF_NONBLOCK support Milosz Tanski
2014-11-10 16:40 ` Milosz Tanski
2014-11-10 16:40 ` [PATCH v6 6/7] fs: pass iocb to generic_write_sync Milosz Tanski
2014-11-10 16:40 ` Milosz Tanski
2014-11-10 16:40 ` [PATCH v6 7/7] fs: add a flag for per-operation O_DSYNC semantics Milosz Tanski
2014-11-10 16:40 ` Milosz Tanski
2014-11-11 6:44 ` [PATCH v6 0/7] vfs: Non-blockling buffered fs read (page cache only) Dave Chinner
2014-11-11 6:44 ` Dave Chinner
2014-11-11 16:02 ` Milosz Tanski
2014-11-11 16:02 ` Milosz Tanski
2014-11-11 17:03 ` Jeff Moyer
2014-11-11 17:03 ` Jeff Moyer
2014-11-11 21:42 ` Dave Chinner
2014-11-11 21:42 ` Dave Chinner
2014-11-11 23:21 ` Jeff Moyer
2014-11-11 23:21 ` Jeff Moyer
2014-11-11 22:49 ` Theodore Ts'o
2014-11-11 22:49 ` Theodore Ts'o
2014-11-11 23:27 ` Thomas Gleixner
2014-11-11 23:27 ` Thomas Gleixner
2014-11-11 21:40 ` Dave Chinner
2014-11-11 21:40 ` Dave Chinner
2014-11-14 16:32 ` Jeff Moyer
2014-11-14 16:32 ` Jeff Moyer
2014-11-14 16:39 ` Dave Jones
2014-11-14 16:39 ` Dave Jones
2014-11-14 16:51 ` Jeff Moyer
2014-11-14 16:51 ` Jeff Moyer
2014-11-14 18:46 ` Milosz Tanski
2014-11-14 18:46 ` Milosz Tanski
[not found] ` <20141114163912.GA23769-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-11-14 18:45 ` Milosz Tanski
2014-11-14 18:45 ` Milosz Tanski
2014-11-14 18:52 ` Jeff Moyer
2014-11-14 18:52 ` Jeff Moyer
[not found] ` <cover.1415636409.git.milosz-B5zB6C1i6pkAvxtiuMwx3w@public.gmane.org>
2014-11-24 9:53 ` Christoph Hellwig
2014-11-24 9:53 ` Christoph Hellwig
2014-11-25 23:01 ` Andrew Morton
2014-12-02 22:17 ` Milosz Tanski
2014-12-02 22:17 ` Milosz Tanski
2014-12-02 22:42 ` Andrew Morton
2014-12-02 22:42 ` Andrew Morton
2014-12-03 9:10 ` Volker Lendecke [this message]
2014-12-03 9:10 ` Volker Lendecke
2014-12-03 16:48 ` Milosz Tanski
[not found] ` <CANP1eJGVyBOt1rQ8jA4tMrNGX5X61-UWbVy6kKj_ByeTqAEOBQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-12-04 23:11 ` Andrew Morton
2014-12-04 23:11 ` Andrew Morton
2014-12-05 8:17 ` Volker Lendecke
2014-12-05 8:17 ` Volker Lendecke
2015-01-21 14:55 ` Milosz Tanski
2015-01-21 14:55 ` Milosz Tanski
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